Finding After Tax interest rate on an investment

veklius

New Member
Joined
Jul 3, 2011
Messages
13
Hi, (first time posting), I could not find any related post to this problem.

Basically, I am looking for something like the "Rate" function but considering that a fraction of each period's return would be taken out and not reinvested for the the next period (also known as Tax). The only unknown here is the interest rate,

I know the present value, future value, number of period, tax rate, and payments per period.

At this point I know how to do it, but it is very inefficient as I have to guess the interest rate until I get the correct future value.

I have a feeling VBA will be needed to complete this task. Any help will be greatly appreciated!!!
 
I agree with shg - this calc taxes year on year, ie pre tx of 22.16% means that the investment compounds at 17.81% per annum.
 
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